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All the Acura motors listed in my book show a chain. The water pumps are driven by a serpentine belt. Water pumps only need changing when they leak out of the drain ho0le underneath or become noisy from failing bearings.

since you have a cherry red catalyst surely you have a clogged cat and if you do emission test surely is going to indicate the catalyst. now if the one of the cylinder heads is running rich just confirm whether you have any injector with a malfunction and instead spraying the fuel is pouring the fuel and cause fuel to go through exhaust not burnt and possible that is the reason which damaged the cat.

Click on the following direct, free Link. It has the Timing Belt + Mark Diagrams for your 2003 Acura 3.2TL V6-Cylinder Engine. Is also has additional - very helpful Instructional and Directional Diagrams.

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

My sincere apologies for the delayed response.I have only been a free contributor to this site for the last 4-months. I am personally going back to answer your unanswered questions.

I do not know if you still need this information, however I am answering it either way.

Click on the following direct Link. It has several Diagrams you will need for your Timing Belt replacement. Included are the Cover Bolt Locations, Tool Needed and Marks for your specific engine.You may also want to Print out these Diagrams for future use.

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!